Krauss-Maffei HZ peeler centrifuge
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 1
2
Krauss-Maffei HZ peeler centrifugeTable of contents
Krauss-Maffei peeler centrifuge, HZ 3
Process advantages 4
Basket designs 5
Operation 6
Centrifuge controls 8
Process automation 9
Foundation/installation 10
Dimensions and weights 11
Technical data 11
Test centers 12
Services 13
Company profile 14
Product lines 15
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 2
3
Krauss-Maffei HZ peeler centrifugeMaximum efficiencyKrauss-Maffei horizontal peeler cen-
trifuges are batch operated filtration
centrifuges known for their reliable
performance at high capacities. They
are used in many processes, primarily
in the bulk chemicals, fine chemicals,
and food industries.
The horizontal rotor assembly is cantilever-
mounted and, depending on the applica-
tion, can be provided with a conventional
filtration basket or a specially designed ro-
tary siphon basket. A fully opening housing
door provides access to the basket and all
process components for maintenance.
Adding variable speed drives and custom-
tailored controls and instrumentation en-
ables the peeler centrifuge to be optimally
adapted to a multitude of processing re-
quirements for peak performance.
Main applications� Bulk chemicals
(Petrochemical intermediates, ferti-lizers, chlorides, sulfates, calciumcompounds, sodium compounds)
� Fine chemicals(Aluminum fluoride, amino acids, bleaching agents, surfactants, herbi-cides, pesticides, catalysts, dyestuffs)
� Pharmaceuticals/related(APIs, vitamins, salicylic acid, citric acid, ascorbic acid, calcium citrate,antibiotics)
� Plastics/related(ABS, resins, melamine, PE, PP, anti-oxidant agents)
� Foodstuff/related(Native and modified starches, arti-ficial sweeteners, vanillin, caffeine)
Processing parametersAverage particle size2-500 µm
Feed solids concentrationFrom 3.0% by wt.
Solids throughputUp to 15 t/h
Materials of construction
for process wetted parts:
� Various grades of stainless steel
� Nickel-based alloys
� Special metals with or without lining
Krauss-Maffei peeler centrifuge, HZ 125/3.2 Si
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 3
4
Krauss-Maffei HZ peeler centrifugeProcess advantages
Krauss-Maffei peeler centrifuges
with rotary siphon
By utilizing the rotary siphon feature, an orig-
inal ANDRITZ KMPT development, the over-
all performance of the peeler centrifuge can
be improved considerably. Substantial ad-
vantages include:
� Increased filtration capacity
Creation of a vacuum beneath the filter cloth
increases the filtration pressure and boosts
the filtration rate.
� Superior product purity
The filtration rate can be adjusted to prolong
the contact time by wash liquid and solids
to produce a purer cake.
� Extended residual heel service life
Regeneration of the residual heel is
achieved by means of backwashing through
the filter medium.
� Smoother operation
Through backwashing and throttling of the
filtration rate, the siphon feature enables
feeding into a liquid pool for uniform distri-
bution of solids without vibration, even with
fast filtering products.
Your benefits� Unequaled flexibilityKrauss-Maffei peeler centrifuges can beadapted easily to changing processrequirements. Different control recipescan be used to select the optimumoperating speed and cycle sequencefor yielding the highest product qualityat peak capacity.
� Lower residual cake moisturedue to high centrifugal forces.
� Excellent wash resultsthrough even distribution of wash liquid,achieved by horizontal basket configura-tion and feed via distributor or spraybars.
Krauss-Maffei peeler centrifuge, HZ 180/7.1
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 4
5
Krauss-Maffei HZ peeler centrifugeBasket designsKrauss-Maffei peeler centrifuges are
furnished with various basket designs.
The versions most frequently applied are the
conventional filtration basket and the rotary
siphon basket, an original ANDRITZ KMPT
development.
Filtration basket
Of fabricated/welded or cast design, the fil-
tration basket has a cylindrical shell with fil-
trate bores through which the filtrate is spun
out into the filtrate housing after passing
through the filter medium.
Rotary siphon basket
Contrary to the conventional perforated
basket, the rotary siphon basket has a solid
cylindrical shell with filtrate bores arranged
radially at the rear end of the basket, where
they are connected to a siphon-shaped
chamber. Once it has penetrated the filter
cake and the filter medium, the filtrate is
redirected through axial channels beneath
filter medium support segments into the
siphon chamber where a pivoting skimmer
pipe extracts it from the centrifuge under
positive pressure. The radial distance be-
tween the filter medium and the liquid level
in the siphon chamber increases the driving
force and thus the filtration rate.
Filtration basket Rotary siphon basket
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 5
SuspensionSolids
Filtrate
6
Krauss-Maffei HZ peeler centrifugeOperationFeeding
The suspension is introduced into the rotat-
ing centrifuge basket via the feed distributor.
Typically, this would include several intermit-
tent feed pulses to prevent the suspen-
sion from spilling over the basket rim. The fill
level is monitored and regulated by a feed
controller. Normally, the basket is filled with
solids up to 75-80% of the basket rim
height. The feed step is complete when the
filter cake has reached the desired level.
Filtration
Primary filtration of the mother liquor
through the filter medium installed in the
basket begins with the feed step and
ends when the liquor has submerged into
the filter cake. The solids retained on the fil-
ter medium after completion of a cycle and
discharge of product serve as a filter
medium for subsequent cycles.
Washing
A cake wash step will often follow the pri-
mary filtration step. Wash liquid is intro-
duced through the feed distributor or,
for lower wash rates, through a separate
spray bar. The wash liquid level is again
monitored by the feed controller and
the wash step is concluded once the pre-
determined amount of wash liquid has
been used and the liquid submerges into
the filter cake.
Dry spinning
Immediately following the feed and wash
step, which may be carried out at a lower
speed, the basket is accelerated to maxi-
mum allowable speed for the cake dry spin-
ning step which ends when the desired
residual cake moisture is reached, or after a
predetermined spin time.
Peeling/cake discharge
At the end of each centrifuge cycle, the filter
cake is removed from the basket by a piv-
oting peeling device equipped with a broad
peeler knife. Depending on the product
characteristics, the peeling motion is con-
ducted at full or reduced basket speed with
adjustable swivel advance velocity. The
scraped layers of product are diverted into
a trough and discharged from the centrifuge
through an inclined chute or a horizontal
screw conveyor. To protect the filter
medium, a thin layer of filter cake is retained
in the basket. This layer, called the residual
heel, becomes the filter aid for subsequent
cycles.
� Discharge chute
The peeled solids are accumulated and
channeled to the outside of the centrifuge
by an inclining chute mounted on the hous-
ing door below the peeling device.
� Screw conveyor
The peeled product is diverted to a horizon-
tal, door-mounted screw conveyor which
conveys the solids to the outside of the cen-
trifuge.
Advantages� Higher centrifuge throughput due to
the potential of utilizing longerbaskets.
� Usable for applications with solidsexhibiting a tendency towards ad-hesion and with increased internalfriction factors, both affecting gravity flow inherent to chute discharge con-figuration.
Siphon basket feeding Siphon basket washing Siphon basket dry spinning
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 6
SuspensionSolids
Filtrate
Siphon basket backwashing Discharge chute Screw conveyor
Backwashing
With the rotary siphon basket it is possible
to feed backwash liquid from an overhead
mounted prime tank through the siphon
chamber to permeate the residual heel from
underneath. This process re-suspends the
residual heel and restores its permeability. It
also primes the rotary siphon for the next fil-
tration cycle. The liquid pool on top of the
heel created through backwashing will as-
sist in evenly distributing the subsequent
cycle’s incoming suspension, which will vir-
tually eliminate the potential for imbalances
during the feed step.
Residual heel removal
After frequent cycles, the residual heel may
have compacted with enough fine solids to
make it impermeable, resulting in poor filtra-
tion performance. When this occurs, the
heel may be regenerated (by backwashing
in siphon peeler centrifuges) or removed
pneumatically or hydraulically (in peeler cen-
trifuges with filtration baskets).
� Pneumatic heel removal
By blowing either compressed air or nitro-
gen against the heel through special flat-jet
nozzles mounted on a pivoting and oscillat-
ing manifold inside the basket, the heel cake
is broken up into pieces and discharged by
the peeling device.
� Hydraulic heel removal
Using the feed distributor, a large quantity of
rinse liquid is introduced into the basket for
a short period of time. The resulting shear
forces create sufficient turbulence to lift
the heel from the filter medium. The rinse liq-
uid with the dispersed heel solids is dis-
charged from the basket by the peeling
device. This step requires diverting the liq-
uid to outside the centrifuge away from the
normal dry product discharge. The rinse liq-
uid can be recycled to the main process or
divided into heel solids and liquid in a sepa-
rate process step.
In both procedures, the heel is removed at
low basket speeds to prevent tearing of the
filter medium. The hydraulic heel removal
step has the added advantage of simulta-
neously cleaning the centrifuge interior. The
most suitable removal procedure will de-
pend upon the specific application.
7
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 7
8
Krauss-Maffei HZ peeler centrifugeCentrifuge controls
Automatic and optimum operation of the
centrifuge to yield a product with uniform
quality at maximum capacity requires a so-
phisticated system for continuously moni-
toring and controlling a number of process
and operating parameters, such as:
� Basket speed
� Feed time and basket fill level
� Filtration rate and spin time
� Wash ratio and wash time
� Safety related inputs, interlocks, position
indicators, and other process-related in-
strument signals
Typically, Krauss-Maffei peeler centrifuges
are provided with variable frequency drives
for operating the centrifuge within a speed
range best suited for each application
and/or step in the process cycle. Program-
mable control electronics housed in local
operator panels and/or in remote control
cabinets evaluate the process signals and
adapt process parameters on a result-de-
pendent basis.
The core controlling devices in peeler cen-
trifuges are feed controllers which provide
the feedback signals for controlling the sup-
ply of product suspension,wash liquid, etc.,
to the centrifuge.
Feed controllers are available in vari-
ous configurations:
Standard paddle feed controller, FKR
With spring-loaded/hydraulic pivoting mo-
tion or fully pneumatic operation.
Thermal feed controller, TFKR
The sensor arm of the TFKR with an em-
bedded thermocouple is pivoted in and out
at adjustable, regular intervals to touch the
surface of the basket filling. The frictional
heat between the sensor and the product
generates a temperature signal which is
conditioned and evaluated by an elec-
tronic controls module.
The advantages of the TFKR are:
� The sensor can differentiate whether it
touches a plane of liquid or the surface of
solids due to the different frictional heat
created by the contact. It can also deter-
mine both the level of basket filling and
the filtrate immersion point which signals
the end of the filtration or wash step.
� Adjustable immersion frequency and
contact time of the TFKR sensor provides
much more precise feedback on the
prevalent processing conditions and al-
lows for faster, more efficient centrifuge
cycles.
Ultrasonic feed controller, UFKR
The ultrasonic controller is a contact-free
measurement system to detect the fill level
in the basket. An ultrasonic probe emits a
signal in the direction of the product in the
basket. The signal reflected by the rising
product is picked up by a sensor and ana-
lyzed by control electronics.
The patented UFKR system by ANDRITZ
KMPT offers the following benefits:
� Continuous level detection.
� No mechanical contact with the product,
eliminating splashing or dusting.
� No mechanical wear on sensors, elimi-
nating potential product contamination
from eroded metal particles.
� No dynamic seals.
� Unobtrusive installation into the process
area.
FKR TFKR UFKR
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 8
9
Krauss-Maffei HZ peeler centrifugeProcess automation • Installation
Perfection in process engineering requires
perfection in process automation.
The superior performance of our process
equipment is based on perfecting the interface
between equipment hardware, electrical com-
ponents, electronics, informatics, and process
know-how to create an all-encompassing cus-
tom-tailored solution for each application. Using
intelligent sensors and state-of-the-art commu-
nication systems, we control and monitor our
machines on a result-oriented basis.
Your benefits:� Enhanced equipment performance� Consistent high product quality� Reduced consumption of utilities� Optional status diagnostics
Automation of machines
Individual adaptation – we can incorporate
the automation concepts for our machine
into your existing control system.
Custom concepts
We provide an individually designed service
package to fit your specification – from the
control of individual units, to incorporation into
existing control systems or automation of
complete plants ready for operation.
Services
Based on your quality assurance program,
we prepare all the required documents for
validation and qualification of the automa-
tion software and hardware. Our extensive
know-how, profound experience and inno-
vative drive qualify us as your partner for val-
idation of our equipment to meet your
production needs.
Machinery directives, ATEX, hazardous lo-
cation regulations – there are many regula-
tions to be met at the plant site. We are
there to serve as your knowledgeable advi-
sor for the safety of your plant.
Installation
Rotation of a centrifuge basket produces not
only the centrifugal forces necessary for the
separation of solids from liquids, but also high
dynamic forces from the acceleration of con-
siderable masses such as the weight of the
basket and its filling with product. Uneven
distribution of the product within the basket
creates imbalance forces which will be trans-
mitted to the structure supporting the cen-
trifuge. To keep the dynamic forces exerted
on the structure to a minimum, the centrifuge
is best mounted on an isolation system
which consists of additional mass (in the form
of a steel or inertia block) supported by spring
and damper elements.
Installation guidelines:� The feed pressure should be around
0.5 bar.� Keep all supply and discharge lines
short and with a maximum possiblegradient.
� All attachments to the centrifuge mustbe flexible.
� Provide for fast draining of all pipeseither by venting or pressure compen-sation in closed loop systems.
� Install sight glasses and sample portsin all supply and discharge lines.
� Provide vertical solids drop withoutcross-sectional restrictions.
Centrifuge installed on inertia block
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 9
H
l2
l1
h1
h2
10
Krauss-Maffei HZ peeler centrifugeDimensions and weights
All technical data are approximate and subject to change without notice.
Model Machine Inertia block Space Weight 1 Weight 2
dimensions dimensions requirements
l1 b1 h1 l2 b2 h2 L B H
[mm] [mm] [mm] [kg] [kg]
HZ 25/0.1 670 500 550 - - - 1,000 1,100 1,400 75 160
HZ 40/0.2 1,000 720 750 800 1,200 60 1,500 1,300 1,800 500 1,350
HZ 63/0.3 1,500 1,100 1,100 1,650 1,600 260 3,600 3,000 1,800 1,250 2,800
HZ 63/0.6 1,600 1,100 1,100 1,650 1,600 260 3,700 3,000 1,800 1,350 3,500
HZ 80/1.0 2,100 1,400 1,300 2,050 2,100 400 4,300 3,500 2,500 2,600 6,000
HZ 80/1.3 2,400 1,400 1,300 2,050 2,100 400 4,700 3,500 2,500 3,000 7,300
HZ 100/1.6 2,600 1,650 1,600 2,400 2,400 680 5,200 3,800 3,000 3,500 12,000
HZ 100/2.0 2,800 1,650 1,600 2,400 2,400 680 5,400 3,800 3,000 4,100 12,500
HZ 125/2.5 2,900 1,900 1,800 2,600 2,500 650 5,900 4,700 3,500 5,500 15,000
HZ 125/3.2 3,400 1,900 1,850 2,900 2,500 650 6,300 4,700 3,500 7,000 19,000
HZ 160/4.0 3,600 2,300 2,200 3,200 3,200 750 6,700 5,600 4,400 10,000 31,000
HZ 160/5.0 4,000 2,300 2,300 3,500 3,200 750 7,200 5,600 4,500 13,000 36,000
HZ 180/7.1 4,700 3,000 3,000 4,650 3,600 700 8,600 6,600 5,300 23,500 55,700
Weight 1: without motor
Weight 2: with inertia block and drive
Space requirements for operation and maintenance
l1 may vary with discharge options
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 10
B
L
b1 b2
11
Krauss-Maffei HZ peeler centrifugeTechnical data
All technical data are approximate and subject to change without notice.
Model Basket inside Basket Basket Filter Max g- Maximum
diameter length volume area force speed
[mm] [mm] [l] [m²] [-] [rpm]
HZ 25/0.1 250 125 2.5 0.10 2,200 4,000
HZ 40/0.2 400 200 9.8 0.25 2,000 3,000
HZ 63/0.3 630 160 20.6 0.32 1,700 2,200
HZ 63/0.6 630 315 40.5 0.62 2,020 2,400
HZ 80/1.0 800 400 83.0 1.01 1,600 1,900
HZ 80/1.3 800 500 103.7 1.26 1,600 1,900
HZ 100/1.6 1,000 500 164.0 1.57 1,290 1,520
HZ 100/2.0 1,000 630 206.6 1.98 1,290 1,520
HZ 125/2.5 1,250 630 323.6 2.46 1,030 1,220
HZ 125/3.2 1,250 800 410.9 3.14 1,030 1,220
HZ 160/4.0 1,600 800 683.6 4.02 805 950
HZ 160/5.0 1,600 1,000 854.6 5.03 805 950
HZ 180/7.1 1,800 1,250 1,350.0 7.07 710 840
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 11
12
ANDRITZ KMPTTest centers
ANDRITZ KMPT operates fully
equipped test centers in Germany
and the USA, offering both bench and
pilot scale equipment.
Our experienced engineers will consult with
you to determine the equipment most ap-
propriate for your product, then will per-
form the necessary trials to optimize the
operating conditions for your process.
Based on these tests, we will provide
a complete report which will recommend
the best solution for your solid/liquid sepa-
ration process, including scale-up informa-
tion for the production equipment.
We can also assist in running long-term tri-
als at your site with equipment from our
rental machine pool.
Test center in Vierkirchen, Germany Production works in Florence, USA Consulting
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 12
13
ANDRITZ KMPTServices
Our goal is to provide our customers
with fast and reliable service, from the
first process consultation throughout
the entire service life of your ANDRITZ
KMPT process equipment.
To assist our global customer base, we op-
erate service facilities around the world
staffed with experienced, dedicated service
teams.
Spare parts
We keep over 6,000 different spare parts
and components in stock for you. Our ser-
vice centers in the USA, the UK, Italy,
France, and China, for example, main-
tain their own spare parts stock to enable
faster delivery to your plant site.
Reconditioned units
We maintain a select stock of reconditioned
units available for fast delivery from our fa-
cility. All machines are fully disassembled, in-
spected and reconditioned by replacing
worn or damaged parts. A final test run val-
idates the mechanical guarantee we provide
with our refurbished equipment. With our
factory reconditioned units you gain produc-
tion capacity quickly with minimal capital in-
vestment.
Repairs and maintenance
Our service centers are ready to provide you
with regularly scheduled maintenance or
emergency service at your site. Our experts
provide assistance including assembly
work, installation support, commissioning,
upgrades, repair work, and optimization of
your process conditions.
Advisory service
Our customer service team is ready to an-
swer any question concerning machine
safety, equipment upgrades, and process
optimization.
Installation and commissioning
Our experienced service personnel assists
you with the installation and start-up of your
equipment.
Remote diagnostics
Using modern communications and diag-
nostic systems, our customer service is able
to offer even faster and more efficient sup-
port. Via remote access our specialists re-
ceive information on the operating condition
of your machine and carry out fault diag-
noses. Maximum data security is of course
guaranteed at all times. We only access the
data from your machine when you give your
specific approval for us to do so.
24-hour on-call service
You can reach our skilled and experienced
service team around the clock.
Maintenance contracts
We offer you tailor-made, long-term con-
tracts for preventive maintenance of your
equipment.
Customer training
We train your operating personnel during
commissioning of the plant. In addition, we
also offer you seminars for maintenance and
operation of our entire line of process equip-
ment. This training can be conducted at our
site or yours.
Refurbished equipment Commissioning Spare parts
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 13
14
ANDRITZ KMPTCompany profile
The ANDRITZ GROUP
The ANDRITZ GROUP is a globally leading
supplier of plants and services for the hy-
dropower, pulp and paper, metals, and
other specialized industries. The Group is
headquartered in Graz, Austria, and has a
staff of approximately 16,100 employees
worldwide. ANDRITZ operates over 120
production sites, service, and sales compa-
nies all around the world.
ANDRITZ SEPARATION
ANDRITZ SEPARATION is one of the lead-
ing global suppliers of plants, equipment,
and services for mechanical and thermal
solid/liquid separation (coal, ore and mineral
processing, chemical, petrochemical, and
food industries). The business area’s field of
activity covers design and manufacture of
key components (centrifuges, filter presses,
rotating filters, drying plants), as well as
erection and start-up of turnkey plants, in-
cluding automation, safety engineering, and
services.
ANDRITZ KMPT
ANDRITZ KMPT has been a world leader
and innovator in the chemical process in-
dustry for over 75 years. The extensive ex-
perience of our engineers comes from
testing more than 3,000 products and put-
ting over 9,000 applications to work. Over
500 patents demonstrate our capacity for
innovation. This extensive knowledge gov-
erns our process and equipment recom-
mendations, all tailored to meet our
customers’ requirements with an optimum
in performance and cost.
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 14
15
ANDRITZ KMPTProduct lines
� Krauss-Maffei centrifuges
With horizontal peeler centrifuges known for
reliability, pharma centrifuges designed to
meet highest quality standards, innovative
vertical basket centrifuges and continuously
operating pusher centrifuges, ANDRITZ
KMPT has the capability to handle a broad
range of separation applications in the
chemicals, pharmaceuticals and environ-
mental industries.
� Krauss-Maffei filters
For vacuum or pressure filtration, our rotary
drum and disc filters combine high yield with
low production costs in the processing of
chemicals, plastics and minerals.
� Krauss-Maffei dryers
Batch drying in our conical mixer dryer with
helical mixing assembly or continuous drying
of free-flowing materials in our plate dryer –
we offer the right choice of dryers for fine
chemical and pharmaceutical producers.
� ANDRITZ KMPT process systems
We apply our experience and expertise to
create fully functional processing modules
including peripherals and automation, sav-
ing the customer from having to deal with
multiple vendors. ANDRITZ KMPT provides
all the detailed engineering and reduces in-
stallation time with pre-assembled systems.
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 15
ANDRITZ AG
Stattegger Strasse 188045 Graz, Austria
Phone: +43 (316) 6902 [email protected]
www.andritz.com
ANDRITZ KMPT GmbHIndustriestrasse 1-385256 Vierkirchen, GermanyPhone: +49 (0)8139 80299 - [email protected]
ANDRITZ stands for ultimate know-how in
solid/liquid separation. Our decade-long
background in this field and comprehen-
sive technology offering enable us to supply
our customers with the best solution
for each application, whether in municipal or
industrial sewage sludge treatment, the
chemical or food industry, or for prepara-
tion of minerals and ores.
Food Chemicals
Mining EnvironmentMinerals
All data, information, statements, photographs and graphic illustrations made in this leaflet are without any obligation and raise no liabilities to or form part of any sales contracts ofANDRITZ AG or any affiliates for equipment and/or systems referred to herein. © ANDRITZ AG 2011. All rights reserved. No part of this copyrighted work may be reproduced, modifiedor distributed in any form or by any means, or stored in any database or retrieval system, without the prior written permission of ANDRITZ AG or its affiliates. Any such unauthorized usefor any purpose is a violation of the relevant copyright laws. ANDRITZ AG, Stattegger Strasse 18, 8045 Graz, Austria HZ-EN-04_11
HZ-EN-04_11.qxp_Layout 1 22.09.11 14:11 Page 16